Chart holder



June 26, 1951 L, E. JENSEN ET AL.

CHART HOLDER 2 Sheets-Sheet 1 Filed Dec. 13, 1948 IIIIIIIIIIIIIIIIIA'III. IIIIIIIA Will/I4 \\\\\Y -"III,VlIlIlIIl/lllllllll; 1111111110(1111111111111, val/$1 $1 JNVENTORS LOUIS E. JENSEN BY JOHN AUER S r 2'x 2;! g

ATTORNEY.

June 26, 1951 L. E. JENSEN ET AL 2,558,565

CHART HOLDER Filed Dec. 13, 1948 2 Sheets-Sheet 2IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII/IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIINVENTORJ LOUIS E. JENSEN JOHN AUER v BY.

Patented June 26, 1951 CHART HOLDER Louis E. Jensen and John Auer,Milwaukee, Wis., assignors to Universal Development Company,

Milwaukee, Wis.

Application December 13, 1948, Serial No. 65,036

4 Claims.

an enclosure.

Another object of our invention is to suspend various charts within anenclosure in a manner whereby they may be selected and exposed one at atime and only one chart at a time will be exposed for observation.

Still another object of our invention is to construct the device in amanner whereby the weight of the casing forming the enclosure insuresand maintains a positive position of the exposed chart.

A further object of our invention is to provide a selector arrangementin the form of an index so that the proper chart is made available forexposition.

A still further object of our invention is to provide an enclosure forthe protection of all charts encased therein when not in use.

It is manifest to any one familiar with the art that in a classroom orthe like it is common practice to use charts for instruction purposesand quite frequently it is necessary and desirable to mount a pluralityof charts at a particular location for the better observation by thepupils and the convenience of the instructor. The device described andclaimed herein provides a single enclosure that encases a plurality ofmaps and charts, protecting them from dust or exposure and arrangingthem in a manner to permit selecting any one individual chart andplacing it in an accessible position and retaining it in that positionwhile it is exposed for use.

Other and further objects of our invention will become more apparent asthe description proceeds when taken in conjunction with the drawings, inwhich Figure 1 is a longitudinal cross sectional view of the entireassembled device.

Figure 2 is an end view of the outside of the enclosure showing themounting bracket.

Figure 3 is an end view of one end of the chain and sprocket arrangementwithin the enclosure, and

Figure 4 is a similar view of the chain and sprocket arrangement incombination with the selector mechanism on the other end within theenclosure.

Similar characters of reference indicate corresponding parts throughoutthe several views and referring now to the same, the character shows anouter shell which forms an enclosure,

this shell may be constructed of sheet metal or the like and is open atits lower end I I, and has its upper end radially formed as shown at l2.

There is an upper shaft l3 and a lower shaft [4 extending horizontallythrough the shell [0. These shafts l3 and I4 have sprockets shown as 15attached near their ends. The upper shaft I3 is journaled in bearingsshown as l6, sup ported by an attaching bracket [1 having outwardlyextending members l8, and provided with engaging slots [9 which are openat their upper ends.

The shell m is provided with vertical slots 20 to permit up and downmovement of the upper shaft iii. The lower shaft I4 is journaled inseparate bearing shown as 2! supported by the side walls of theenclosure [0.

The sprockets l5 have five engaging slots shown as 22, however, any oddnumber of slots may be employed so that the sprockets may always be inalignment with one another in a manner whereby a slot 22 will always beat the top of the lower sprocket, when a pair of chains shown as 23 andhaving an even number of links 24 are employed. The links 24 areconstructed of pairs of plates arranged in staggered relation to oneanother, separated by pins or rollers 25 and these rollers 25 are of asize to fit the contour of the engaging slots 22 in the sprockets IS.The plates 24 on one chain 23 have round apertures 26 while the plates24 on the other chain 23 have elongated apertures or slots 21. Theapertures and slots 25 and 21 respectively, are in direct alignment withone another to accommodate a conventional type of spring roller ontowhich the charts or maps shown as 28 are mounted.

The shell I 0 being supported by the lower shaft l4 permits the uppershaft l3 to slidably move within the vertical slots 26 in the shell l3through which the upper shaft I3 extends. The movement of the shaft l3causes the raising and lowering of the shell l0 due to the revolving ofthe sprockets I5 which will then bring the distance between the shaftsl3 and I4 either closer together or farther apart. They are shown toincrease the distance between them when a chart 28 is at the extremebottom of the lower sprocket i5, in which case a corresponding link 24supporting a chart 28 is at the extreme top of the upper sprocket l5 asshown in Fig. 3. When an en.-

gaging slot 22 is at the top of the upper sprocket l5 and the bottom ofthe lower sprocket l5, the distance between the shafts I3 and I4 willdecrease due to the weight of the shell [0.

There is an auxiliary shaft 29 journaledin a single bearing 30, which issupported by one of the end walls of the shell I0, and a spur gear 3| isattached to the shaft 29. The spur gear 3| has teeth on its outerperiphery which engage a pinion 32 which is mounted near one end of thebottom shaft M, and a knob 33 is shown attached to the outer end-ofthelshaf-t .M. This-knob is-employed to revolve the shaft F4. Theauxiliary shaft 2'9 has an indicator hand 34 attached thereto and theoutside end plate of the shell H] has a pIurality of digits or numerals35 embossed or marked thereon. When the gears are properly calibrated,that is, when the gear 3| has sixty teeth, and there are twenty linksshown-as 2 in the chain 23, the pinion 32 on the shaft It When turned bythe knob 33, must move the gear 3i a distance equivalent to three't'eethon-its outer periphery. Obviously, if there are twenty links in thechain there wouldbe a provision for mounting twenty maps within theenclosure or shell 1 0 and thedigits 35 would read from one" to twentyinclusive, and every time the knob 33 is turned to bring the next linkv24 into alignmentwith. the opening H at the bottom of the'shell' I theindicator hand '34 would move to the next digit 35.

In this manner the links could be numbered to correspond with the digitson a log or'in'dex of the charts, and the respective link mounting wouldprovide selectivity in the relation of the indicator with the digits.

While we have shown a particular arrange- .ment of the component partsconstituting our device we are fully cognizant of the fact thatmanychanges in the form and configuration of the component parts may be madewithout affecting their operativeness', andwe reserve the right to makesuch changes as we deem necessary or convenient without departing fromthe spirit of our invention or the scope of the appended claims.

Having thus described our invention what we claim and desire to secureby Letters Patent in the United States is:

1. A device of the character described com-. prising in combination, anouter shell open at its lower end, an upper shaft extendinglongitudinall through saidshell, a mounting bracket having a pair ofoutwardly extending arms, said upper shaft journaled within bearingsdisposed within said arms, the end plates of said shell provided withvertical slots for accommodating said upper shaft, a lower shaftextending longitudinally through said shell, a pair of bearings disposedwithin the lower portion of the end walls of said shell, said lowershaft journaled within said bearings, a pair of sprockets mounted ontosaid upper shaft, a pair of sprockets mounted onto said lower shaft,said sprockets equipped with an odd number of engaging slots on theirouter periphery, a pair of link chains disposed over the periphery ofsaid sprockets in engagement with said slots, a plurality of chartrollers, said chain links supporting'said chart rollers, an'auxiliaryshaft, an auxiliary bearing mounted in one end wall of said shell, saidauxiliaryi'shaft journaled in said auxiliary bearing and projectingoutward therefrom,

"a spur gear mounted on the said auxiliary shaft Within said shell, anindicator mounted to the outwardly projecting end of said auxiliaryshaft, digits disposed on the outer face of said end wall radiallyaround the end of said auxiliary shaft, a pinion mounted to said lowershaft, said pinion in alignment and in engagement with said spur gear,and a knob'attached to the outwardly extending end of" said lower shaftfor revolving 4 said shaft, thereby actuating said indicator forregistration with said digits.

2. A device of the character described comprising in combination, ashell forming an enclosure provided with an elongated aperture at itslower end, an upper shaft extending longitudinally through said shell,.a. mounting bracket having a pair of outwardly ex'tendingarms, saidupper shaft journaled within bearings disposed within the arms of saidmounting bracket, the

said shell, a pair of bearings disposed within the lower portion of theend walls of said shell, said lower shaft journaled within saidbearings, a

' pair of "sprockets mounted on the said upper shaft, a pair ofsprockets mounted on said lower shaft, said sprockets provided withengaging slots extending inward from the outer periphery of saidsprockets, said slots being odd in number, a pair of link chainsdisposed over the periphery of said sprockets in engag'ementwith "saidslots, a plurality of chart rollers, said chain links supporting saidchart rollers, an auxiliary bearing supported by one end wallofsaidsh'e'll, an auxiliary shaft journaled within said auxiliar bearing andprojecting outward therefrom, a spur gear mounted onto said auxiliaryshaft within said shell, an indicator mounted to the outwardlyprojecting end of said auxiliary shaft, digits disposed on' the outersurface of one of said end walls, said digits disposed radially aroundthe end of said-auxiliary shaft, a pinion 'mounted to one of said shaftswithinsaidenclosure, said pinion in alignment and engagement,

with said spur gear, and a wheel attached to the outwardly projectingend of "the shaft supporting said pinion for revolving said shaft,thereby actuating said indicator in' its relation with said digits.

3. A device of the :characterdescrib'ed comprising in combination,a'shell'forming an enclosure provided with an elongated aperture atitslower end, an upper shaft extendingv longitudinally through saidshell, a mounting bracket having a pair of outwardly extending arms,said upper shaft journaled within bearings disposed within the arms onsaid mounting bracket, the end plate of said shell provided withvertical slots for accommodating said upper shaft, a lower shaftextending longitudinally through said shell, a pair of bearings disposedwithinthe lowerportion of the end walls of said shell, said lower shaftauxiliary shaft within said shell, a pinion mounted on said lower shaftwithin said shell, for engagement 'With said bearing; an indicatormounted to the outwardly projecting endf-of said auxiliary shaft,numerals corresponding in number' with the links on said chaindispose'don the outer face of one-of said endwalls, saidnumeralsarrangedradially around the end ofsaid auxili ary shaft, said pinion onsaid lower shaft in direct alignment and engagement with said spur gear,and revolving means attached to the outwardly extending end of saidlower shaft for revolving said shaft thereby actuating the indicator inits relation with the numerals on the outer face of the end wall.

4. A device of the character described comprising in combination, anouter shell open at its lower end, an upper shaft extendinglongitudinally through said shell, a mounting fixture extendinglongitudinally along the outer wall of said enclosures, said fixturehaving outwardly extending support arms, said upper shaft journaledwithin bearings disposed within said arms, the end plates of said shellprovided with vertical slots for accommodating said upper shaft, a lowershaft extending longitudinally through said shell, a pair of bearingsdisposed within the lower portion of the end walls of said shell, saidlower shaft journaled within said bearings, a pair of sprockets mountedonto said upper shaft, a pair of sprockets mounted onto said lowershaft, said sprockets equipped with an odd number of engaging slots ontheir outer peripheral surface, a pair of link chains engaging saidsprockets, a plurality of chart rollers, said chain links supportin saidchart rollers in longitudinal alignment with said enclosure, anauxiliary shaft, an auxiliary bearing mounted onto one end of saidshell, said auxiliary shaft journaled in said auxiliary bearing andprojecting outward therefrom, a spur gear mounted onto said auxiliaryshaft within said shell, an indicator mounted to the outwardlyprojecting end of said auxiliary shaft, outside of said shell, digitsdisposed in radial fashion round the outer end of said lower shaft onthe outer face of the end Wall of said enclosure, a pinion mounted tosaid lower shaft, said pinion in direct alignment and engagement withsaid spur gear, and revolving means attached to the outwardly extendingend of said lower shaft for revolving said shaft thereby actuating saidindicator in relation to said digits.

LOUIS E. JENSEN. JOHN AUER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 699,293 Doldt May 6, 19021,576,412 Cronk Mar. 9, 1926 FOREIGN PATENTS Number Country Date 441,445Germany Mar. 7, 1927

